期刊
JOURNAL OF COMPOSITE MATERIALS
卷 54, 期 15, 页码 2023-2035出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998319890405
关键词
Fusion bonding; polymer mesh; continuous welded seam; high frequency welding; joining
资金
- European research program Clean Sky
- European Unions Horizon 2020 Clean Sky 2 Joint Undertaking under the AIRFRAME ITD [807083]
- H2020 Societal Challenges Programme [807083] Funding Source: H2020 Societal Challenges Programme
Continuous ultrasonic welding is a high-speed joining method for thermoplastic composites. Currently, a thin film energy director is used to focus the heat generation at the interface. However, areas of intact energy director remain in the welded seam, which significantly lowers the weld strength, and result in a non-uniformly welded seam. To improve the weld uniformity of continuous ultrasonically welded joints, we changed to a more compliant energy director. A woven polymer mesh energy director was found to give a significant improvement in weld quality. The mesh was flattened in between the composite adherends during the welding process. This flattening promoted a good contact between the energy director and the adherends, fully wetting the adherend surfaces, resulting in a more uniformly welded seam without areas of intact energy director.
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